code: def test_profiler_failure_message(ray_start_with_dashboard):
      # Sanity check py-spy and memray is installed.
      subprocess.check_call(["py-spy", "--version"])
      subprocess.check_call(["memray", "--version"])
  
      assert (
          wait_until_server_available(
              ray_start_with_dashboard["webui_url"]
          )
          is True
      )
      address_info = ray_start_with_dashboard
      webui_url = address_info["webui_url"]
      webui_url = format_web_url(webui_url)
  
      @ray.remote
      class Actor:
          def getpid(self):
              return os.getpid()
  
          def do_stuff_infinite(self):
              while True:
                  pass
  
      a = Actor.remote()
      pid = ray.get(a.getpid.remote())
      a.do_stuff_infinite.remote()
  
      def get_actor_stack():
          response = requests.get(
              f"{webui_url}/worker/traceback?pid={pid}"
          )
          response.raise_for_status()
          content = response.content.decode("utf-8")
          print("CONTENT", content)
          assert "do_stuff_infinite" in content, content
  
      # First ensure dashboard is up, before we test for failure cases.
      assert wait_until_succeeded_without_exception(
          get_actor_stack,
          (requests.RequestException, AssertionError),
          timeout_ms=20000,
          retry_interval_ms=1000,
      )
  
      # Check we return the right status code and error message on failure.
      response = requests.get(
          f"{webui_url}/worker/traceback?pid=1234567"
      )
      content = response.content.decode("utf-8")
      print(content)
      assert (
          "text/plain" in response.headers["Content-Type"]
      ), response.headers
      assert "Failed to execute" in content, content
  
      # Check we return the right status code and error message on failure.
      response = requests.get(
          f"{webui_url}/worker/cpu_profile?pid=1234567"
      )
      content = response.content.decode("utf-8")
      print(content)
      assert (
          "text/plain" in response.headers["Content-Type"]
      ), response.headers
      assert "Failed to execute" in content, content
  
      # Check we return the right status code and error message on failure.
      response = requests.get(f"{webui_url}/memory_profile?pid=1234567")
      content = response.content.decode("utf-8")
      print(content)
      assert (
          "text/plain" in response.headers["Content-Type"]
      ), response.headers
      assert "Failed to execute" in content, content
  
      # Check wrong ip failure
      response = requests.get(
          f"{webui_url}/memory_profile?ip=1234567&pid=1234567"
      )
      content = response.content.decode("utf-8")
      print(content)
      assert (
          "Failed to execute: No stub with given ip value" in content
      ), content
  
file_path: ray/python/ray/tests/test_dashboard_profiler.py
imports: import pytest
  import subprocess
  import os
  import requests
  import sys
  import ray
  from ray._private.test_utils import format_web_url, wait_until_server_available, wait_until_succeeded_without_exception
label_desc: Use image node_id 3 for calling a global function with example usage: test_profiler_failure_message(ray_start_with_dashboard) and returns: os